Chemically driven energetic molecular ferroelectrics

Yong Hu, Zhiyu Liu, Chi-Chin Wu (), Jennifer L. Gottfried (), Rose Pesce-Rodriguez, Scott D. Walck, Peter W. Chung and Shenqiang Ren ()
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Yong Hu: The State University of New York
Zhiyu Liu: University of Maryland
Chi-Chin Wu: Aberdeen Proving Ground
Jennifer L. Gottfried: Aberdeen Proving Ground
Rose Pesce-Rodriguez: Aberdeen Proving Ground
Scott D. Walck: Aberdeen Proving Ground
Peter W. Chung: University of Maryland
Shenqiang Ren: The State University of New York

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Chemically driven thermal wave triggers high energy release rate in covalently-bonded molecular energetic materials. Molecular ferroelectrics bridge thermal wave and electrical energy by pyroelectric associated with heating frequency, thermal mass and heat transfer. Herein we design energetic molecular ferroelectrics consisting of imidazolium cations (energetic ion) and perchlorate anions (oxidizer), and describe its thermal wave energy conversion with a specific power of 1.8 kW kg−1. Such a molecular ferroelectric crystal shows an estimated detonation velocity of 7.20 ± 0.27 km s−1 comparable to trinitrotoluene and hexanitrostilbene. A polarization-dependent heat transfer and specific power suggests the role of electron-phonon interaction in tuning energy density of energetic molecular ferroelectrics. These findings represent a class of molecular ferroelectric energetic compounds for emerging energy applications demanding high power density.

Date: 2021
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DOI: 10.1038/s41467-021-26007-2

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